The answer should be -4, at least by my mathematical calculations. If you want me to just ask and I'll show the work as well.

Its very simple to solve. you have to go left to right calculated...
Right ans is 8

Coin Marketplace

STEEM 0.47
TRX 0.08
JST 0.060
BTC 46581.05
ETH 3874.57
BNB 533.89
SBD 5.44